An elementary school nearby has a great big rock on the edge of the playground. The kids aren't allowed to climb on it, but of course everyone wants to, so some of the teachers call it "the poison rock," implying that if you touch it you will be poisoned. Other teachers refuse to go along with this ruse, so the kids all argue about whether the rock is poisonous, and they run and touch it if they're feeling really lucky...
A childhood belief about teachers

others believed things like this
- My friends and I used to believe that if you planted a rock, it would grow a rock tree. Anon
- I used to believe the the Elton John song, "Crocodile Rock" was about a Crocodile, named Rock.Anon
- I believed that our teachers lived at school. They were teachers--they had no reason to leave :)(Anon
- I used to believe that the rock thing they used in the sport Curling, was a tea kettle.— Kaninchen
- I somehow got the idea that if I boiled a rock, it would come to life. My dad disproved that...Anon
- When I was around seven years-old, my friend and I put a rock in a microwave and thought it would melt.— Lars